[aprssig] Using SSID's outside 0 to 15

Chris Moulding chrism at crosscountrywireless.net
Wed Mar 3 14:38:25 EST 2010

I understand that there is an AX.25 limitation that restricts 
conventional APRS using 1200 bd AX.25 to SSID's of 0 to 15.

Using the APRS over PSK-63 system in APRS Messenger there is no 
restriction and something like G4HYG-HF goes through the APRS-IS and can 
be viewed on aprs.fi and APRS clients OK. See: 

If SSID'd outside the 0 - 16 range were to be used regularly would this 
cause a problem? I know D-Star uses some alphanumeric SSID's over the 
APRS-IS so am I right in thinking probably not?


Chris, G4HYG

Chris Moulding
Cross Country Wireless (2009) Ltd
7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
Tel/fax: +44(0)1204 410626
Mobile:  +44(0)7752 391908
Website: http://www.crosscountrywireless.net
Company number 6780346 registered in England and Wales  

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